Low temperature melting curve of He3 |
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| Authors: | R. T. Johnson O. V. Lounasmaa R. Rosenbaum O. G. Symko J. C. Wheatley |
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| Affiliation: | (1) Department of Physics, University of California at San Diego, La Jolla, California;(2) Present address: Department of Technical Physics, Technical University of Helsinki, Otaniemi, Finland;(3) Present address: Department of Physics, Technion, Haifa, Israel |
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| Abstract: | Measurements of the melting curve of He3 have been made from 3 m° K to 40 m° K, after cooling the liquid-solid He3 mixture by the adiabatic solidification method. The slope of the melting curve shows that at the lowest temperature there is a substantial departure of the solid He3 entropy fromR ln 2. This effect is due to nuclear spin ordering. Temperatures below 3 m° K were obtained during compression. By theoretically estimating the melting curve below 3 m° K it is possible to estimate temperatures from pressure measurements. By such means it is estimated that Kelvin temperatures of 1.5 to 2 m° K were actually achieved.This work has been supported by the U.S. Atomic Energy Commission under Contract AT(11-1)-34, P.A. 143.In partial fulfillment of the requirements for a Ph.D. degree at the University of Illinois. |
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